WO2003064185A1 - Bearing unit for vehicle wheel - Google Patents

Bearing unit for vehicle wheel Download PDF

Info

Publication number
WO2003064185A1
WO2003064185A1 PCT/JP2003/000727 JP0300727W WO03064185A1 WO 2003064185 A1 WO2003064185 A1 WO 2003064185A1 JP 0300727 W JP0300727 W JP 0300727W WO 03064185 A1 WO03064185 A1 WO 03064185A1
Authority
WO
WIPO (PCT)
Prior art keywords
hub
peripheral surface
bearing unit
raceway
wheel
Prior art date
Application number
PCT/JP2003/000727
Other languages
French (fr)
Japanese (ja)
Inventor
Junshi Sakamoto
Original Assignee
Nsk Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27654388&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2003064185(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nsk Ltd. filed Critical Nsk Ltd.
Priority to JP2003563835A priority Critical patent/JPWO2003064185A1/en
Priority to EP03701881A priority patent/EP1470936A4/en
Publication of WO2003064185A1 publication Critical patent/WO2003064185A1/en
Priority to US10/914,976 priority patent/US20050058380A1/en
Priority to US11/213,116 priority patent/US7464469B2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0015—Hubs for driven wheels
    • B60B27/0021—Hubs for driven wheels characterised by torque transmission means from drive axle
    • B60B27/0026—Hubs for driven wheels characterised by torque transmission means from drive axle of the radial type, e.g. splined key
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0005—Hubs with ball bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • B60B27/0084—Hubs characterised by the fixation of bearings caulking to fix inner race
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0094—Hubs one or more of the bearing races are formed by the hub
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y10T29/49679—Anti-friction bearing or component thereof
    • Y10T29/4968—Assembling of race, cage, and rolling anti-friction members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49696—Mounting

Definitions

  • the present invention relates to an improvement of a wheel bearing unit for rotatably supporting wheels of an automobile with respect to a suspension device.
  • a bolt inserted through the through hole provided in the rotating body for braking is formed on the rotating flange. It is premised on a structure to be screwed into the screw hole. Background art
  • a wheel 1 forming a wheel of an automobile and a rotor 2 forming a disc brake as a braking device are rotatably supported on a nut 3 forming a suspension device, for example, by a structure as shown in FIG. That is, the outer ring 6 constituting the wheel bearing unit 5 to which the present invention is applied is fixed to the circular support hole 4 formed in the knuckle 3 by a plurality of bolts 7.
  • the wheel 1 and the mouth 2 are fixedly connected to a hub 8 constituting the wheel bearing unit 5 by a plurality of bolts 9.
  • the outer end portion of the hub 8 (the outer side in the axial direction refers to the outer side in the width direction when assembled to the vehicle, and is the left side of each figure. Conversely, the outer side portion is the right side of each figure at the center side in the width direction. The same is used throughout this specification.)
  • a portion of the outer peripheral surface protruding from the outer ring 6 near the outer peripheral edge of the rotating flange 10 is a plurality of circumferentially equally spaced plural parts on a single circumference. Threaded holes 11 are formed at four locations (generally 4 to 6 locations).
  • through holes 12 and 13 are formed at portions near the inner peripheral edge of the wheel 1 and the mouth 2 so as to align with the screw holes 11 respectively.
  • Double row outer ring tracks 14a and 14b are fixed on the inner peripheral surface of the outer ring 6 and fixed on the outer peripheral surface. Side flanges 15 are formed respectively.
  • the outer ring 6 is fixed to the knuckle 3 by connecting the fixed flange 15 to the knuckle 3 with the bolts 7.
  • the hub 8 is formed by combining a hub body 16 and an inner ring 17.
  • the rotating flange 10 is formed in a part of the outer peripheral surface of the hub body 16 protruding from the outer end opening of the outer ring 6.
  • a positioning cylinder 19 is formed on the outer end surface of the hub body 16.
  • the outer peripheral surface 20 of the positioning cylinder 19 is concentric with the hub body 16.
  • the wheel 1 and the roaster 2 are fitted with the respective bolts on one side (the outer side in the illustrated example) of the rotating flange 10 in a state where the inner peripheral edge of each wheel is fitted to the positioning cylinder 19. According to 9, the connection is fixed. In this state, the wheels 1 and 2 and the hub 8 are concentric with each other.
  • a portion of the double-row outer ring raceways 14 a and 14 b facing the outer outer raceway 14 a is provided with a first inner raceway 2. 1 is formed directly on the hub body 16.
  • the inner ring 17 is externally fitted and fixed to a small-diameter stepped portion 22 formed on the outer peripheral surface of the inner end portion of the hub body 16 to constitute the hub 8.
  • the second inner raceway 23 formed on the outer peripheral surface of the inner raceway 17 is opposed to the inner outer raceway 14b of the double row outer raceways 14a and 14b.
  • a plurality of balls 24, 24, each of which is a rolling element is provided between each of these outer raceways 14a, 14b and the first and second inner raceways 21, 23, a plurality of balls 24, 24, each of which is a rolling element, is provided. It is provided so as to roll freely while being held by the retainers 25 and 25. With this configuration, a double-row angular contact type ball bearing as a rear combination is formed, and the hub 8 is rotatably supported inside the outer ring 6 and capable of supporting radial loads and thrust loads. ing. Seal rings 26 a and 26 are provided between the inner peripheral surfaces of both ends of the outer ring 6, the outer peripheral surface of the intermediate portion of the hub body 16 and the outer peripheral surface of the inner end of the inner ring 17, respectively. b is provided to shut off the internal space provided with the balls 24 and 24 from the outside.
  • the center of the hub body 16 described above is used.
  • a spline hole 27 is formed in the portion.
  • the spline shaft 29 of the constant velocity joint 28 is inserted into the spline hole 27.
  • the inner peripheral edges of the wheel 1 and the roller 2 are externally fitted to the positioning cylinder portion 19, so that the wheel 1 and the roller 2 and the hub 8 are concentric with each other.
  • the rotor 2 is combined with a support and a carrier (not shown) fixed to the knuckle 3 to constitute a disc brake for braking.
  • a pair of pads provided on both sides of the above-mentioned road 2 are pressed against both sides of the road 2.
  • the mouth 2 externally fitted to the positioning cylinder 19 is swung in the radial direction.
  • the rotational balance during actual driving deteriorates, and the driving performance, especially the riding comfort and running stability during high-speed driving, deteriorates.
  • the above positioning cylinder is fixed.
  • the outer surface 20 of the portion 19 is easily affected by whirling.
  • the wheel bearing unit of the present invention is designed to suppress the radial deflection of the brake rotating body such as the rotor 2 or the brake drum based on the rotation of the hub 8. It was invented. Disclosure of the invention
  • the wheel bearing unit of the present invention is for rotatably supporting a wheel and a rotating body for braking with respect to a suspension device, and includes a non-rotating outer ring, a hub rotating on the inner diameter side of the outer ring, and a plurality of hubs. Rolling elements.
  • the outer ring has a double-row outer ring raceway on the inner peripheral surface, and does not rotate while being supported by the suspension device during use.
  • the hub is formed by combining a hub body and one inner ring.
  • the hub main body is formed at an outer end portion of an outer peripheral surface to support the wheel and the rotating body for braking, and a rotating side flange having a screw hole for fixing the wheel and the rotating body for braking;
  • a first inner raceway directly provided in the middle of the surface and opposed to the outer raceway of the outer raceways, and an inner peripheral edge of the rotating body for braking provided on the outer end surface are fitted over the outer raceway.
  • a positioning cylinder section for the positioning.
  • the inner ring has a second inner ring raceway on the outer peripheral surface facing the inner one of the outer raceways, and is externally fitted to an inner end of the hub body.
  • a plurality of the rolling elements are provided between the outer raceways and the inner raceways so as to be freely rollable.
  • At least a portion of the outer peripheral surface of the positioning cylinder portion along the rotation of the hub, in which the brake rotating body is externally fitted, has a radial deflection. 15 m or less.
  • the positioning cylinder is provided at the outer end of the hub.
  • the geometric center of the braking rotator externally fitted to the positioning cylindrical portion is made to coincide with the rotation center of the hub, and the vibration of the braking rotator is adjusted.
  • FIG. 1 is a sectional view showing a first example of an embodiment of the present invention.
  • FIG. 2 is a sectional view showing a second example of the embodiment of the present invention.
  • FIG. 3 is a cross-sectional view showing one example of an assembled state of a wheel bearing unit which is an object of the present invention.
  • FIG. 1 shows a first example of an embodiment of the present invention.
  • a fixed-side flange 15 for fixing the outer ring 6 to the knuckle 3 (FIG. 3) is provided on the outer peripheral surface of the intermediate portion of the outer ring 6.
  • a plurality of rows of outer raceways 14a and 14b are formed on the inner peripheral surface of the outer race 6, a plurality of rows of outer raceways 14a and 14b are formed.
  • First and second inner ring raceways 21 and 23 are provided on portions of the outer peripheral surfaces of the 1016a and the inner ring 17 that face the outer ring raceways 14a and 14b, respectively.
  • the first inner raceway 21 is formed directly on the outer peripheral surface of the intermediate portion of the hub main body 16a, and the small-diameter stepped portion 22 formed near the inner end of the hub main body 16a has The inner ring 17 having the second inner ring raceway 23 formed on the outer peripheral surface is externally fitted.
  • a swaged portion 30 is formed at the inner end of the hub body 16a. That is, after the inner ring 17 is externally fitted to the small-diameter stepped portion 22, the portion protruding from the inner end face of the inner ring 17 at the inner end of the hub body 16 a is plastically deformed radially outward. Thus, the caulked portion 30 is formed, and the caulked portion 30 suppresses the inner end face of the inner ring 17.
  • This inner ring 17 is externally fitted and fixed to the inner end of the hub body 16a to form the hub 8a.
  • a portion of the outer peripheral surface of the eight-wheel body 16a near the outer end protruding from the outer end opening of the outer ring 6 includes a wheel 1 that constitutes a wheel, and a port that is a rotating body for braking.
  • a rotating flange 10a for fixing the drum 2 (Fig. 3) or the drum is provided.
  • a plurality of screw holes 11a are formed at a plurality of positions on the rotation side flange 10a in the circumferential direction on the same circumference centered on the rotation center of the hub body 16a. These screw holes 11a are for screwing the bolts 9 (Fig. 3) for fixing the wheel 1 and the mouth 2 above.
  • the positioning cylinder portion 19a is provided concentrically with the hub body 16a.
  • the base end (inner end) of the outer peripheral surface 20a of the positioning cylindrical portion 19a is a large diameter portion 31 for externally fitting the inner peripheral edge of the rotor 2 described above.
  • the intermediate portion or the tip portion (outer end portion) is a small diameter portion 32 for externally fitting the inner peripheral edge portion of the wheel 1.
  • the large-diameter portion 31 and the small-diameter portion 32 are concentric with each other and continuous with each other by the stepped portion 33.
  • a plurality of balls 24, 24, each of which is a rolling element, are provided between each of the outer raceways 14a, 14b and the first and second inner raceways 21, 23. It is provided so as to roll freely while being held by retainers 25 and 25, respectively.
  • a pair of seal rings 26a and 26b are provided between the inner peripheral surface of the 10 part, the outer peripheral surface of the middle part of the main body 16a, and the outer peripheral surface of the inner end of the inner ring 17.
  • the interior space 34 in which the balls 24 and 24 are provided and the outside are shut off to prevent leakage of the dust sealed in the interior space 34 and foreign matter to enter the interior space 34. It aims to prevent entry.
  • the dimensions and the shape accuracy of the outer peripheral surface 20a with respect to the rotation center of the hub 8 are ensured so as to be 20 15 m or less.
  • at least the large-diameter portion 31 of the outer peripheral surface 20a should have a deflection of 15 m or less (only the large-diameter portion 31 has a deflection of 15 or less).
  • the run-out of the small-diameter portion 32 in addition to the large-diameter portion 31 is suppressed to 15 m or less.
  • the work of ensuring the accuracy of the outer peripheral surface 20a as described above involves increasing the shape and dimensional accuracy of the components of the wheel bearing unit 5a, as well as the wheel bearing unit. It can also be performed by subjecting the outer peripheral surface 20a of the positioning cylinder portion 19a to finishing after the assembly of the socket 5a. Of these operations, finishing work after assembly is performed by turning or grinding the outer peripheral surface 20a or by micro-finishing the hub. This is done by finishing the cylinder surface concentric with the rotation center of 8a.
  • the constituent members of the wheel bearing unit 5a are Except for the outer peripheral surface 20a of the positioning cylinder portion 19a, it is processed into a predetermined shape and dimensions.
  • the outer peripheral surface 20a of the positioning cylinder portion 19a is processed into a rough shape and dimensions.
  • the components of the wheel bearing unit 5a are assembled in the state shown in FIG. Thereafter, while the outer ring 6 is fixed and the hub 8a is rotated, the outer peripheral surface 20a is subjected to turning, grinding, or micro-finishing.
  • the positioning cylinder 19 provided on the outer end surface of the hub body 16a for externally fitting the rotor 2 (see FIG. 3). Since the amount of whirling of the outer peripheral surface 20 a (particularly the large diameter portion 3 1) of a is suppressed to 15 or less, the whirling of the above-mentioned road 2 during traveling is suppressed, and the part that rotates together with the above-mentioned hub 8 a By improving the rotational balance of the vehicle, it is possible to improve the running performance of the vehicle with a focus on ride comfort and running stability.
  • FIG. 2 shows a second example of the embodiment of the present invention.
  • the inner end of the inner ring 17 fitted to the small-diameter step 22 at the inner end of the hub body 16b constituting the hub 8b is attached to the hub body 1 It protrudes inward from the inner end face of 6b.
  • the outer end surface of the constant velocity joint 28 comes into contact with the inner end surface of the inner ring 17 so that the inner ring 17 comes out of the hub body 16b.
  • the present invention is not limited to the bearing unit for the driving wheel as shown in the figure, but can be implemented with a bearing unit for the driven wheel. Industrial applicability
  • the wheel bearing unit of the present invention is configured and operates as described above, it is possible to improve running performance mainly in riding comfort and stability during high-speed running.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

A bearing unit for vehicle wheel, wherein a rotor forming a braking device is threaded to tapped holes (11a) formed in a rotation side flange (10a) in the state of being fitted onto a positioning tube part (19a) and further fixedly connected to a hub (8a) with tightening bolts, and the radial deflection of the outer peripheral surface (20a) of the positioning tube part (19a) caused by the rotation of the hub (8a) is suppressed to 15 μm or less to suppress the deflection of the rotor, whereby a running performance mainly composed of riding comfortableness and stability in high-speed running can be increased.

Description

明細書 車輪用軸受ュニット 技術分野  Description Wheel bearing unit Technical field
この発明は、 自動車の車輪を懸架装置に対し回転自在に支持する為の車輪用軸 受ユニットの改良に関する。 特に本発明は、 ハブの外周面に設けた回転側フラン ジに制動用回転体を固定する場合に、 この制動用回転体に設けた通孔を挿通した ボルトを、 上記回転側フランジに形成したねじ孔に螺合させる構造を前提とした ものである。 背景技術  The present invention relates to an improvement of a wheel bearing unit for rotatably supporting wheels of an automobile with respect to a suspension device. In particular, according to the present invention, when the rotating body for braking is fixed to the rotating flange provided on the outer peripheral surface of the hub, a bolt inserted through the through hole provided in the rotating body for braking is formed on the rotating flange. It is premised on a structure to be screwed into the screw hole. Background art
自動車の車輪を構成するホイール 1及び制動装置であるディスクブレーキを構 成するロータ 2は、 例えば図 3に示す様な構造により、 懸架装置を構成するナツ クル 3に回転自在に支承している。 即ち、 このナックル 3に形成した円形の支持 孔 4部分に、 本発明の対象となる車輪用軸受ユニット 5を構成する外輪 6を、 複 数本のボルト 7により固定している。  A wheel 1 forming a wheel of an automobile and a rotor 2 forming a disc brake as a braking device are rotatably supported on a nut 3 forming a suspension device, for example, by a structure as shown in FIG. That is, the outer ring 6 constituting the wheel bearing unit 5 to which the present invention is applied is fixed to the circular support hole 4 formed in the knuckle 3 by a plurality of bolts 7.
一方、 上記車輪用軸受ュニット 5を構成するハブ 8に上記ホイール 1及び口一 夕 2を、 複数本のボルト 9により結合固定している。 この為に、 上記ハブ 8の外 端部 （軸方向に関して外とは、 車両への組み付け状態で幅方向外側を言い、 各図 の左側。 逆に、 幅方向中央側で各図の右側となる側を内と言う。 本明細書全体で 同じ。 ） 外周面で上記外輪 6から突出した部分に形成した回転側フランジ 1 0の 外周縁寄り部分で単一円周上の円周方向等間隔複数個所 （一般的には 4〜 6個 所） に、 ねじ孔 1 1を形成している。 又、 上記ホイール 1及び口一夕 2の内周縁 寄り部分で上記各ねじ孔 1 1に整合する部分に、 それぞれ通孔 1 2、 1 3を形成 している。 上記ホイール 1及びロータ 2を上記ハブ 8に結合固定する場合には、 上記両通孔 1 2、 1 3を外側から内側に挿通した上記各ボルト 9を上記各ねじ孔 1 1に螺合し更に緊締する。  On the other hand, the wheel 1 and the mouth 2 are fixedly connected to a hub 8 constituting the wheel bearing unit 5 by a plurality of bolts 9. For this reason, the outer end portion of the hub 8 (the outer side in the axial direction refers to the outer side in the width direction when assembled to the vehicle, and is the left side of each figure. Conversely, the outer side portion is the right side of each figure at the center side in the width direction. The same is used throughout this specification.) A portion of the outer peripheral surface protruding from the outer ring 6 near the outer peripheral edge of the rotating flange 10 is a plurality of circumferentially equally spaced plural parts on a single circumference. Threaded holes 11 are formed at four locations (generally 4 to 6 locations). In addition, through holes 12 and 13 are formed at portions near the inner peripheral edge of the wheel 1 and the mouth 2 so as to align with the screw holes 11 respectively. When the wheel 1 and the rotor 2 are connected and fixed to the hub 8, the bolts 9 having the through holes 12 and 13 inserted from the outside to the inside are screwed into the screw holes 11, respectively. Tighten.
又、 上記外輪 6の内周面には複列の外輪軌道 1 4 a、 1 4 bを、 外周面には固定 側フランジ 1 5を、 それぞれ形成している。 この様な外輪 6は、 この固定側フラ ンジ 1 5を上記ナックル 3に、 上記各ボルト 7で結合する事により、 このナック ル 3に対し固定している。 これに対して、 上記ハブ 8は、 ハブ本体 1 6と内輪 1 7とを組み合わせて成る。 このうちのハブ本体 1 6の外周面の一部で、 上記外輪 6の外端開口から突出した部分には、 上記回転側フランジ 1 0を形成している。 又、 上記ハブ本体 1 6の外端面に、 位置決め筒部 1 9を形成している。 この位置 決め筒部 1 9の外周面 2 0は、 上記ハブ本体 1 6と同心にしている。 Double row outer ring tracks 14a and 14b are fixed on the inner peripheral surface of the outer ring 6 and fixed on the outer peripheral surface. Side flanges 15 are formed respectively. The outer ring 6 is fixed to the knuckle 3 by connecting the fixed flange 15 to the knuckle 3 with the bolts 7. On the other hand, the hub 8 is formed by combining a hub body 16 and an inner ring 17. The rotating flange 10 is formed in a part of the outer peripheral surface of the hub body 16 protruding from the outer end opening of the outer ring 6. A positioning cylinder 19 is formed on the outer end surface of the hub body 16. The outer peripheral surface 20 of the positioning cylinder 19 is concentric with the hub body 16.
上記ホイール 1及びロー夕 2は、 それぞれの内周縁部を上記位置決め筒部 1 9 に外嵌した状態で、 上記回転側フランジ 1 0の片側面 （図示の例では外側面） に、 上記各ボルト 9により、 結合固定している。 この状態で、 上記ホイール 1及 びロー夕 2と上記ハブ 8とが互いに同心になる。 又、 上記ハブ本体 1 6の中間部 外周面で、 上記複列の外輪軌道 1 4 a、 1 4 bのうちの外側の外輪軌道 1 4 aに 対向する部分には、 第一の内輪軌道 2 1を、 上記ハブ本体 1 6に対し直接形成し ている。 更に、 上記ハブ本体 1 6の内端部外周面に形成した小径段部 2 2に上記 内輪 1 7を外嵌固定して、 上記ハブ 8を構成している。 そして、 この内輪 1 7の 外周面に形成した第二の内輪軌道 2 3を、 上記複列の外輪軌道 1 4 a、 1 4 bの うちの内側の外輪軌道 1 4 bに対向させている。  The wheel 1 and the roaster 2 are fitted with the respective bolts on one side (the outer side in the illustrated example) of the rotating flange 10 in a state where the inner peripheral edge of each wheel is fitted to the positioning cylinder 19. According to 9, the connection is fixed. In this state, the wheels 1 and 2 and the hub 8 are concentric with each other. In the outer peripheral surface of the intermediate portion of the hub body 16, a portion of the double-row outer ring raceways 14 a and 14 b facing the outer outer raceway 14 a is provided with a first inner raceway 2. 1 is formed directly on the hub body 16. Further, the inner ring 17 is externally fitted and fixed to a small-diameter stepped portion 22 formed on the outer peripheral surface of the inner end portion of the hub body 16 to constitute the hub 8. The second inner raceway 23 formed on the outer peripheral surface of the inner raceway 17 is opposed to the inner outer raceway 14b of the double row outer raceways 14a and 14b.
これら各外輪軌道 1 4 a、 1 4 bと第一、 第二の各内輪軌道 2 1、 2 3との間 には、 それぞれが転動体である玉 2 4、 2 4を複数個ずつ、 それぞれ保持器 2 5、 2 5により保持した状態で転動自在に設けている。 この構成により、 背面組 み合わせである複列アンギユラ型の玉軸受を構成し、 上記外輪 6の内側に上記ハ ブ 8を、 回転自在に、 且つ、 ラジアル荷重及びスラスト荷重を支承自在に支持し ている。 尚、 上記外輪 6の両端部内周面と、 上記ハブ本体 1 6の中間部外周面及 び上記内輪 1 7の内端部外周面との間には、 それぞれシ一ルリング 2 6 a , 2 6 bを設けて、 上記各玉 2 4、 2 4を設けた内部空間と外部とを遮断している。 更 に、 図示の例は、 駆動輪 （ 車及び ！^車の後輪、 F F車の前輪、 4 WD車の 全輪） 用の車輪用軸受ユニット 5である為、 上記ハブ本体 1 6の中心部に、 スプ ライン孔 2 7を形成している。 そして、 このスプライン孔 2 7に、 等速ジョイン ト 2 8のスプライン軸 2 9を挿入している。 上述の様な車輪用軸受ュニット 5の使用時には、 図 3に示す様に, 外輪 6をナ ックル 3に固定すると共に、 ハブ本体 1 6の回転側フランジ 1 0に、 図示しない タイヤを組み合わせたホイール 1及びロータ 2を固定する。 この際、 前述した様 に、 ホイール 1及びロー夕 2の内周縁部を位置決め筒部 1 9に外嵌する事によ り、 これらホイール 1及びロー夕 2と上記ハブ 8とを互いに同心にする。 又、 こ のうちのロータ 2と、 上記ナックル 3に固定した、 図示しないサポート及びキヤ リバとを組み合わせて、 制動用のディスクブレーキを構成する。 制動時には、 上 記ロー夕 2を挟んで設けた 1対のパッドをこのロー夕 2の両側面に押し付ける。 上述の様な構造で、 走行時にロータ 2が振れ回る （回転に伴って外周縁が径方 向に変位する） のを防止する為には、 このロー夕 2の幾何中心と上記ハブ 8の回 転中心とがー致している事が必要である。 これに対して、 上述の図 3に示した様 に、 ハブ 8の中間部外周面に第一の内輪軌道 2 1を直接形成する、 所謂第三世代 の車輪用軸受ュニッ卜の場合には、 ハブ本体 1 6の軸方向中間部で上記第一の内 輪軌道 2 1を形成した部分と、 第二の内輪軌道 2 3を設けた内輪 1 7を外嵌固定 する為の小径段部 2 2とが段付形状となる。 この様な構造の場合、 上記第一、 第 二の内輪軌道 2 1、 2 3の平行度や同軸度の悪化に基づいて、 上記ハブ 8の幾何 中心とその回転中心とがずれ易い。 そして、 これら両中心同士がずれた場合に は、 このハブ 8の外端面に形成した位置決め筒部 1 9の外周面 2 0が、 このハブ 8の回転に伴って径方向に振れ回り運動し易くなる。 Between each of these outer raceways 14a, 14b and the first and second inner raceways 21, 23, a plurality of balls 24, 24, each of which is a rolling element, is provided. It is provided so as to roll freely while being held by the retainers 25 and 25. With this configuration, a double-row angular contact type ball bearing as a rear combination is formed, and the hub 8 is rotatably supported inside the outer ring 6 and capable of supporting radial loads and thrust loads. ing. Seal rings 26 a and 26 are provided between the inner peripheral surfaces of both ends of the outer ring 6, the outer peripheral surface of the intermediate portion of the hub body 16 and the outer peripheral surface of the inner end of the inner ring 17, respectively. b is provided to shut off the internal space provided with the balls 24 and 24 from the outside. Furthermore, since the example shown is a wheel bearing unit 5 for driving wheels (a rear wheel of a car and an! ^ Car, a front wheel of an FF car, and all wheels of a 4WD car), the center of the hub body 16 described above is used. A spline hole 27 is formed in the portion. The spline shaft 29 of the constant velocity joint 28 is inserted into the spline hole 27. When using the wheel bearing unit 5 as described above, as shown in FIG. 3, the outer ring 6 is fixed to the knuckle 3 and the wheel (not shown) is combined with the rotating flange 10 of the hub body 16 and a tire (not shown). 1 and rotor 2 are fixed. At this time, as described above, the inner peripheral edges of the wheel 1 and the roller 2 are externally fitted to the positioning cylinder portion 19, so that the wheel 1 and the roller 2 and the hub 8 are concentric with each other. . Further, the rotor 2 is combined with a support and a carrier (not shown) fixed to the knuckle 3 to constitute a disc brake for braking. At the time of braking, a pair of pads provided on both sides of the above-mentioned road 2 are pressed against both sides of the road 2. With the structure described above, in order to prevent the rotor 2 from swaying during traveling (the outer peripheral edge is displaced in the radial direction with the rotation), the geometric center of the rotor 2 and the rotation of the hub 8 are required. It is necessary that the center of rotation be aligned. On the other hand, as shown in FIG. 3 described above, in the case of a so-called third-generation wheel bearing unit in which the first inner raceway 21 is formed directly on the outer peripheral surface of the intermediate portion of the hub 8, A small-diameter step portion 2 2 for externally fitting and fixing the portion where the first inner raceway 21 is formed at the axially intermediate portion of the hub body 16 and the inner race 17 provided with the second inner raceway 23. Has a stepped shape. In the case of such a structure, the geometric center of the hub 8 and the rotation center thereof are easily shifted from each other based on the deterioration of the parallelism and the coaxiality of the first and second inner raceways 21 and 23. When the two centers are displaced from each other, the outer peripheral surface 20 of the positioning cylindrical portion 19 formed on the outer end surface of the hub 8 tends to whirling in the radial direction as the hub 8 rotates. Become.
この様な原因で上記位置決め筒部 1 9の外周面 2 0が振れ回り運動すると、 こ の位置決め筒部 1 9に外嵌した上記口一夕 2が径方向に振れ回る事になる。 この 結果、 仮に車輪のホイールバランスが確保されていたとしても、 実際の走行時に 於ける回転バランスが悪化し、 高速走行時に於ける乗り心地や走行安定性を中心 とする走行性能が悪化する。 特に、 回転側フランジ 1 0に口一夕 2を、 この回転 側フランジ 1 0に形成したねじ孔 1 1にボルト 9を螺合 ·緊締する事により結合 固定する構造の場合には、 上記位置決め筒部 1 9の外周面 2 0の振れ回りによる 影響を受け易くなる。  When the outer peripheral surface 20 of the positioning cylinder 19 is swirling due to such a cause, the mouth 2 externally fitted to the positioning cylinder 19 is swung in the radial direction. As a result, even if the wheel balance of the wheels is ensured, the rotational balance during actual driving deteriorates, and the driving performance, especially the riding comfort and running stability during high-speed driving, deteriorates. In particular, in the case of a structure where the mouth 2 is connected to the rotating flange 10 and the bolt 9 is screwed and tightened into the screw hole 11 formed in the rotating flange 10, the above positioning cylinder is fixed. The outer surface 20 of the portion 19 is easily affected by whirling.
本発明の車輪用軸受ユニットは、 この様な事情に鑑みて、 ハブ 8の回転に基づ く、 ロー夕 2或はブレーキドラム等の制動用回転体の径方向の振れを抑えるべく 発明したものである。 発明の開示 In view of such circumstances, the wheel bearing unit of the present invention is designed to suppress the radial deflection of the brake rotating body such as the rotor 2 or the brake drum based on the rotation of the hub 8. It was invented. Disclosure of the invention
本発明の車輪用軸受ュニットは、 車輪及び制動用回転体を懸架装置に対し回転 自在に支持する為のものであって、 回転しない外輪と、 この外輪の内径側で回転 するハブと、 複数個の転動体とを備える。  The wheel bearing unit of the present invention is for rotatably supporting a wheel and a rotating body for braking with respect to a suspension device, and includes a non-rotating outer ring, a hub rotating on the inner diameter side of the outer ring, and a plurality of hubs. Rolling elements.
上記外輪は、 内周面に複列の外輪軌道を有し、 使用時に上記懸架装置に支持さ れた状態で回転しない。  The outer ring has a double-row outer ring raceway on the inner peripheral surface, and does not rotate while being supported by the suspension device during use.
又、 上記ハブは、 ハブ本体と 1個の内輪とを組み合わせて成る。  The hub is formed by combining a hub body and one inner ring.
上記ハブ本体は、 上記車輪及び上記制動用回転体を支持する為に外周面の外端 部に形成され、 これら車輪及び制動用回転体を固定する為のねじ孔を有する回転 側フランジと、 外周面中間部に直接設けられて上記各外輪軌道のうちの外側の外 輪軌道と対向する第一の内輪軌道と、 外端面に設けられた、 上記制動用回転体の 内周縁部を外嵌する為の位置決め筒部とを備える。  The hub main body is formed at an outer end portion of an outer peripheral surface to support the wheel and the rotating body for braking, and a rotating side flange having a screw hole for fixing the wheel and the rotating body for braking; A first inner raceway directly provided in the middle of the surface and opposed to the outer raceway of the outer raceways, and an inner peripheral edge of the rotating body for braking provided on the outer end surface are fitted over the outer raceway. And a positioning cylinder section for the positioning.
又、 上記内輪は、 外周面に上記各外輪軌道のうちの内側の外輪軌道と対向する 第二の内輪軌道を有し、 上記ハブ本体の内端部に外嵌されている。  The inner ring has a second inner ring raceway on the outer peripheral surface facing the inner one of the outer raceways, and is externally fitted to an inner end of the hub body.
更に、 上記各転動体は、 上記各外輪軌道と上記各内輪軌道との間に、 それぞれ 複数個ずつ転動自在に設けられている。  Further, a plurality of the rolling elements are provided between the outer raceways and the inner raceways so as to be freely rollable.
特に、 本発明の車輪用軸受ユニットに於いては、 上記ハブの回転に伴う上記位 置決め筒部の外周面のうちで、 少なくとも上記制動用回転体を外嵌する部分の径 方向に関する振れが 1 5 m以下である。 位置決め筒部は該ハブの外端部に設け られる。  In particular, in the wheel bearing unit of the present invention, at least a portion of the outer peripheral surface of the positioning cylinder portion along the rotation of the hub, in which the brake rotating body is externally fitted, has a radial deflection. 15 m or less. The positioning cylinder is provided at the outer end of the hub.
上述の様に構成する本発明の車輪用軸受ュニッ卜の場合、 上記位置決め筒部に 外嵌する制動用回転体の幾何中心とハブの回転中心とを一致させて、 この制動用 回転体の振れ回りを抑え、 乗り心地や走行安定性を中心とする車両の走行性能の 向上を図れる。 図面の簡単な説明  In the case of the wheel bearing unit of the present invention configured as described above, the geometric center of the braking rotator externally fitted to the positioning cylindrical portion is made to coincide with the rotation center of the hub, and the vibration of the braking rotator is adjusted. By suppressing the turning, it is possible to improve the running performance of the vehicle, focusing on ride comfort and running stability. BRIEF DESCRIPTION OF THE FIGURES
図 1は、 本発明の実施の形態の第 1例を示す断面図。 図 2は、 本発明の実施の形態の第 2例を示す断面図。 FIG. 1 is a sectional view showing a first example of an embodiment of the present invention. FIG. 2 is a sectional view showing a second example of the embodiment of the present invention.
図 3は、 本発明の対象となる車輪用軸受ュニッ卜の組み付け状態の 1例を示す 断面図。  FIG. 3 is a cross-sectional view showing one example of an assembled state of a wheel bearing unit which is an object of the present invention.
5発明を実施するための最良の形態 5 Best mode for carrying out the invention
図 1は、 本発明の実施の形態の第 1例を示している。 本例の車輪用軸受ュニッ ト 5 aは、 外輪 6の中間部外周面に、 この外輪 6をナックル 3 (図 3 ) に結合固 定する為の固定側フランジ 1 5を設けている。 又、 上記外輪 6の内周面には、 複 列の外輪軌道 1 4 a、 1 4 bを形成している。 又、 ハブ 8 aを構成するハブ本体 FIG. 1 shows a first example of an embodiment of the present invention. In the wheel bearing unit 5a of this example, a fixed-side flange 15 for fixing the outer ring 6 to the knuckle 3 (FIG. 3) is provided on the outer peripheral surface of the intermediate portion of the outer ring 6. Further, on the inner peripheral surface of the outer race 6, a plurality of rows of outer raceways 14a and 14b are formed. The hub body that constitutes the hub 8a
10 1 6 a及び内輪 1 7の外周面で上記各外輪軌道 1 4 a、 1 4 bに対向する部分に 第一、 第二の内輪軌道 2 1、 2 3を、 それぞれ設けている。 First and second inner ring raceways 21 and 23 are provided on portions of the outer peripheral surfaces of the 1016a and the inner ring 17 that face the outer ring raceways 14a and 14b, respectively.
即ち、 上記ハブ本体 1 6 aの中間部外周面に直接第一の内輪軌道 2 1を形成す ると共に、 このハブ本体 1 6 aの内端寄り部分に形成した小径段部 2 2に、 その 外周面に第二の内輪軌道 2 3を形成した上記内輪 1 7を外嵌している。 そして、 That is, the first inner raceway 21 is formed directly on the outer peripheral surface of the intermediate portion of the hub main body 16a, and the small-diameter stepped portion 22 formed near the inner end of the hub main body 16a has The inner ring 17 having the second inner ring raceway 23 formed on the outer peripheral surface is externally fitted. And
15 この内輪 1 7が上記小径段部 2 2から抜け出るのを防止する為に、 上記ハブ本体 1 6 aの内端部にかしめ部 3 0を形成している。 即ち、 上記小径段部 2 2に上記 内輪 1 7を外嵌した後、 上記ハブ本体 1 6 aの内端部でこの内輪 1 7の内端面か ら突出した部分を径方向外方に塑性変形させて上記かしめ部 3 0を形成し、 この かしめ部 3 0により上記内輪 1 7の内端面を抑え付けている。 この構成により、15 In order to prevent the inner ring 17 from slipping out of the small-diameter stepped portion 22, a swaged portion 30 is formed at the inner end of the hub body 16a. That is, after the inner ring 17 is externally fitted to the small-diameter stepped portion 22, the portion protruding from the inner end face of the inner ring 17 at the inner end of the hub body 16 a is plastically deformed radially outward. Thus, the caulked portion 30 is formed, and the caulked portion 30 suppresses the inner end face of the inner ring 17. With this configuration,
20 この内輪 1 7は、 上記ハブ本体 1 6 aの内端部に外嵌固定されて、 上記ハブ 8 a を構成する。 20 This inner ring 17 is externally fitted and fixed to the inner end of the hub body 16a to form the hub 8a.
又、 この八ブ本体 1 6 aの外周面の外端寄り部分で、 上記外輪 6の外端開口か ら突出した部分には、 車輪を構成するホイール 1、 及び、 制動用回転体である口 一夕 2 (図 3 ) 或はドラムを固定する為の回転側フランジ 1 0 aを設けている。 25 この回転側フランジ 1 0 aの円周方向複数個所で、 上記ハブ本体 1 6 aの回転中 心をその中心とする同一円周上には、 それぞれねじ孔 1 1 aを形成している。 こ れら各ねじ孔 1 1 aは、 上記ホイール 1及び口一夕 2を固定するボルト 9 (図 3 ) を螺合させる為のものである。  A portion of the outer peripheral surface of the eight-wheel body 16a near the outer end protruding from the outer end opening of the outer ring 6 includes a wheel 1 that constitutes a wheel, and a port that is a rotating body for braking. A rotating flange 10a for fixing the drum 2 (Fig. 3) or the drum is provided. 25 A plurality of screw holes 11a are formed at a plurality of positions on the rotation side flange 10a in the circumferential direction on the same circumference centered on the rotation center of the hub body 16a. These screw holes 11a are for screwing the bolts 9 (Fig. 3) for fixing the wheel 1 and the mouth 2 above.
又、 上記ハブ本体 1 6 aの外端面に、 上記ホイール 1及びロー夕 2を外嵌支持 する為の位置決め筒部 1 9 aを、 上記ハブ本体 1 6 aと同心に設けている。 本例 の場合、 この位置決め筒部 1 9 aの外周面 2 0 aのうち、 基端部 （内端部） を上 記ロータ 2の内周縁部を外嵌する為の大径部 3 1とし、 中間部乃至先端部 （外端 部） を、 上記ホイール 1の内周縁部を外嵌する為の小径部 3 2としている。 これ 5 ら大径部 3 1と小径部 3 2とは互いに同心で、 段部 3 3により互いに連続してい る。 In addition, the wheel 1 and the rope 2 are externally fitted and supported on the outer end surface of the hub body 16a. The positioning cylinder portion 19a is provided concentrically with the hub body 16a. In the case of this example, the base end (inner end) of the outer peripheral surface 20a of the positioning cylindrical portion 19a is a large diameter portion 31 for externally fitting the inner peripheral edge of the rotor 2 described above. The intermediate portion or the tip portion (outer end portion) is a small diameter portion 32 for externally fitting the inner peripheral edge portion of the wheel 1. The large-diameter portion 31 and the small-diameter portion 32 are concentric with each other and continuous with each other by the stepped portion 33.
又、 上記各外輪軌道 1 4 a、 1 4 bと第一、 第二の各内輪軌道 2 1 、 2 3との 間には、 それぞれが転動体である複数個の玉 2 4、 2 4を、 それぞれ保持器 2 5、 2 5により保持した状態で、 転動自在に設けている。 尚、 上記外輪 6の両端 A plurality of balls 24, 24, each of which is a rolling element, are provided between each of the outer raceways 14a, 14b and the first and second inner raceways 21, 23. It is provided so as to roll freely while being held by retainers 25 and 25, respectively. In addition, both ends of the outer ring 6
10部内周面と、 上記八ブ本体 1 6 aの中間部外周面及び上記内輪 1 7の内端部外周 面との間には、 1対のシールリング 2 6 a、 2 6 bを設けて、 上記各玉 2 4、 2 4を設けた内部空間 3 4と外部とを遮断し、 この内部空間 3 4内に封入したダリ ースの漏洩防止と、 この内部空間 3 4内への異物の進入防止とを図っている。 上述の様な車輪用軸受ュニット 5 aに設けた前記位置決め筒部 1 9 aの外周面A pair of seal rings 26a and 26b are provided between the inner peripheral surface of the 10 part, the outer peripheral surface of the middle part of the main body 16a, and the outer peripheral surface of the inner end of the inner ring 17. However, the interior space 34 in which the balls 24 and 24 are provided and the outside are shut off to prevent leakage of the dust sealed in the interior space 34 and foreign matter to enter the interior space 34. It aims to prevent entry. Outer peripheral surface of the positioning cylinder 19 a provided on the wheel bearing unit 5 a as described above
15 2 0 a (大径部 3 1及び小径部 3 2 ) は、 上記外輪 6の内径側で前記ハブ 8 aが 回転する事に伴って径方向に関して振れるが、 本発明の車輪用軸受ュニット 5 a の場合には、 この振れを 1 5 z^ m以下に抑えている。 即ち、 上記外輪 6を固定 し、 上記外周面 2 0 aに変位センサの測定子を突き当てた状態で上記ハブ 8 aを 回転させた場合に、 この変位センサの測定値の振れ （最大値と最小値との差） が1520a (the large-diameter portion 31 and the small-diameter portion 32) oscillates in the radial direction as the hub 8a rotates on the inner diameter side of the outer ring 6, but the wheel bearing unit 5 according to the present invention. In the case of a, this swing is suppressed to less than 15 z ^ m. That is, when the hub 8a is rotated with the outer ring 6 fixed and the probe of the displacement sensor abutted against the outer peripheral surface 20a, the displacement of the measured value of the displacement sensor (the maximum value and the Difference from the minimum)
20 1 5 m以下となる様に、 上記ハブ 8の回転中心に対する上記外周面 2 0 aの寸 法並びに形状精度を確保している。 尚、 本発明を実施する場合に、 上記外周面 2 0 aのうちの少なくとも大径部 3 1の振れを 1 5 m以下に抑えれば良い （大径 部 3 1のみ、 振れを 1 5 以下としても良い） が、 好ましくは、 この大径部 3 1に加えて上記小径部 3 2も、 振れを 1 5 m以下に抑える。 The dimensions and the shape accuracy of the outer peripheral surface 20a with respect to the rotation center of the hub 8 are ensured so as to be 20 15 m or less. When the present invention is implemented, at least the large-diameter portion 31 of the outer peripheral surface 20a should have a deflection of 15 m or less (only the large-diameter portion 31 has a deflection of 15 or less). However, preferably, the run-out of the small-diameter portion 32 in addition to the large-diameter portion 31 is suppressed to 15 m or less.
25 尚、 この様に上記外周面 2 0 aの精度を確保する作業は、 上記車輪用軸受ュニ ット 5 aの構成各部材の形状並びに寸法精度を高くする他、 この車輪用軸受ュニ ット 5 aを組立後に上記位置決め筒部 1 9 aの外周面 2 0 aに仕上加工を施す事 によっても行なえる。 このうち、 組立後に仕上加工を施す作業は、 上記外周面 2 0 aを旋削加工、 又は研削加工、 またはマイクロフィニッシュにより、 前記ハブ 8 aの回転中心と同心の円筒面に仕上げる事により行なう。 この場合には、 上記 位置決め筒部 1 9 aの外周面 2 0 aに旋削加工、 又は研削加工、 又はマイクロフ ィニッシュを施すのに先立って、 上記車輪用軸受ュニット 5 aの構成各部材を、 上記位置決め筒部 1 9 aの外周面 2 0 aを除いて、 所定の形状及び寸法に加工す る。 又、 上記位置決め筒部 1 9 aの外周面 2 0 aは、 おおまかな形状及び寸法に 加工する。 次いで、 上記車輪用軸受ユニット 5 aの構成各部材を、 図 1に示す状 態に組み立てる。 その後、 上記外輪 6を固定した状態で上記ハブ 8 aを回転させ つつ、 上記外周面 2 0 aに旋削加工、 又は研削加工、 又はマイクロフィニッシュ を施す。 25 The work of ensuring the accuracy of the outer peripheral surface 20a as described above involves increasing the shape and dimensional accuracy of the components of the wheel bearing unit 5a, as well as the wheel bearing unit. It can also be performed by subjecting the outer peripheral surface 20a of the positioning cylinder portion 19a to finishing after the assembly of the socket 5a. Of these operations, finishing work after assembly is performed by turning or grinding the outer peripheral surface 20a or by micro-finishing the hub. This is done by finishing the cylinder surface concentric with the rotation center of 8a. In this case, prior to turning, grinding, or microfinishing the outer peripheral surface 20a of the positioning cylinder portion 19a, the constituent members of the wheel bearing unit 5a are Except for the outer peripheral surface 20a of the positioning cylinder portion 19a, it is processed into a predetermined shape and dimensions. The outer peripheral surface 20a of the positioning cylinder portion 19a is processed into a rough shape and dimensions. Next, the components of the wheel bearing unit 5a are assembled in the state shown in FIG. Thereafter, while the outer ring 6 is fixed and the hub 8a is rotated, the outer peripheral surface 20a is subjected to turning, grinding, or micro-finishing.
何れにしても、 本例の車輪用軸受ュニット 5 aの場合には、 前記ハブ本体 1 6 aの外端面に設けた、 ロータ 2 (図 3参照） を外嵌する為の位置決め筒部 1 9 a の外周面 2 0 a (特に大径部 3 1 ) の振れ回り量を 1 5 以下に抑えているの で、 走行時に上記ロー夕 2の振れ回りを抑え、 上記ハブ 8 aと共に回転する部分 の回転バランスを良好にして、 乗り心地や走行安定性を中心とする車両の走行性 能の向上を図れる。  In any case, in the case of the wheel bearing unit 5a of the present example, the positioning cylinder 19 provided on the outer end surface of the hub body 16a for externally fitting the rotor 2 (see FIG. 3). Since the amount of whirling of the outer peripheral surface 20 a (particularly the large diameter portion 3 1) of a is suppressed to 15 or less, the whirling of the above-mentioned road 2 during traveling is suppressed, and the part that rotates together with the above-mentioned hub 8 a By improving the rotational balance of the vehicle, it is possible to improve the running performance of the vehicle with a focus on ride comfort and running stability.
即ち、 本発明者の行なった実験によると、 下表に示す様に、 上記振れ回り量が 2 0 μ ιτι以上の場合には乗り心地や走行安定性を中心とする車両の走行性能が必 ずしも良好とはならないが、 上記振れ回り量を 1 5 以下に抑えると、 この走 行性能が良好になった。 That is, according to the experiment conducted by the present inventor, as shown in the table below, when the whirling amount is 20 μιτι or more, the traveling performance of the vehicle, especially the riding comfort and traveling stability, is inevitable. Although it was not good, the running performance was improved when the amount of whirling was suppressed to 15 or less.
表 1 table 1
Figure imgf000010_0001
次に、 図 2は、 本発明の実施の形態の第 2例を示している。 本例の車輪用軸受 ュニット 5 bの場合、 ハブ 8 bを構成するハブ本体 1 6 bの内端部の小径段部 2 2に外嵌した内輪 1 7の内端部を、 このハブ本体 1 6 bの内端面よりも内方に突 出させている。 車両への組み付け状態で上記内輪 1 7の内端面には、 等速ジョイ ント 2 8 (図 3参照） の外端面が当接して、 この内輪 1 7が上記ハブ本体 1 6 b から抜け出る事を防止する。 その他の構成及び作用は、 上述した第 1例の場合と 同様であるから、 重複する説明は省略する。 尚、 本発明は、 図示の様な駆動輪用 の軸受ュニッ卜に限らず、 従動輪用の軸受ュニットでも実施できる。 産業上の利用の可能性
Figure imgf000010_0001
Next, FIG. 2 shows a second example of the embodiment of the present invention. In the case of the wheel bearing unit 5b of the present example, the inner end of the inner ring 17 fitted to the small-diameter step 22 at the inner end of the hub body 16b constituting the hub 8b is attached to the hub body 1 It protrudes inward from the inner end face of 6b. When assembled to the vehicle, the outer end surface of the constant velocity joint 28 (see Fig. 3) comes into contact with the inner end surface of the inner ring 17 so that the inner ring 17 comes out of the hub body 16b. To prevent. Other configurations and operations are the same as in the case of the above-described first example, and thus redundant description will be omitted. In addition, the present invention is not limited to the bearing unit for the driving wheel as shown in the figure, but can be implemented with a bearing unit for the driven wheel. Industrial applicability
本発明の車輪用軸受ユニットは、 以上に述べた通り構成され作用するので、 高 速走行時の乗り心地や安定性を中心とする走行性能を向上できる。  Since the wheel bearing unit of the present invention is configured and operates as described above, it is possible to improve running performance mainly in riding comfort and stability during high-speed running.

Claims

請求の範囲 The scope of the claims
1 . 回転しない外輪と、 回転するハブを有し、 該ハブの外端部に位置決め筒部を 設け、 該位置決め筒部の外周面は、 径方向の振れが 1 5ミクロン以下になってい て、 制動用回転体が該位置決め筒部にはめ合わせられていることからなる車輪用 軸受ュニット。 1. It has an outer ring that does not rotate and a hub that rotates, and a positioning cylinder is provided at the outer end of the hub. The outer circumferential surface of the positioning cylinder has a radial runout of 15 microns or less, A wheel bearing unit, comprising a braking rotary body fitted to the positioning cylinder.
2 . 車輪及び制動用回転体を懸架装置に対し回転自在に支持する為の車輪用軸受 ュニッ卜であって、  2. A wheel bearing unit for rotatably supporting a wheel and a rotating body for braking with respect to a suspension device,
回転しない外輪と、 この外輪の内径側で回転するハブと、 複数個の転動体とを 備え、  An outer ring that does not rotate, a hub that rotates on the inner diameter side of the outer ring, and a plurality of rolling elements,
上記外輪は、 内周面に複列の外輪軌道を有し、 使用時に上記懸架装置に支持さ れた状態で回転しないものであり、  The outer race has a double-row outer raceway on its inner peripheral surface, and does not rotate while being supported by the suspension device during use.
上記ハブは、 ハブ本体と 1個の内輪とを組み合わせて成るものであって、 上記 ハブ本体は、 上記車輪及び上記制動用回転体を支持する為に外周面の外端部に形 成され、 これら車輪及び制動用回転体を固定する為のねじ孔を有する回転側フラ ンジと、 外周面中間部に直接設けられて上記各外輪軌道のうちの外側の外輪軌道 と対向する第一の内輪軌道と、 外端面に設けられた、 上記制動用回転体の内周縁 部を外嵌する為の位置決め筒部とを備えたものであり、 上記内輪は、 外周面に上 記各外輪軌道のうちの内側の外輪軌道と対向する第二の内輪軌道を有し、 上記ハ ブ本体の内端部に外嵌されたものであり、  The hub is formed by combining a hub body and one inner ring, and the hub body is formed at an outer end of an outer peripheral surface to support the wheels and the rotating body for braking, A rotating flange having screw holes for fixing the wheels and the rotating body for braking, and a first inner raceway directly provided in the middle portion of the outer peripheral surface and facing the outer raceway of the outer raceways. And a positioning cylinder portion provided on the outer end surface for externally fitting the inner peripheral edge portion of the rotating body for braking, wherein the inner ring is provided on the outer peripheral surface of the outer ring raceway. A second inner raceway facing the inner outer raceway, the outer raceway being fitted to the inner end of the hub body;
上記各転動体は、 上記各外輪軌道と上記各内輪軌道との間に、 それぞれ複数個 ずつ転動自在に設けられている車輪用軸受ユニットに於いて、  In the wheel bearing unit, a plurality of rolling elements are provided between the outer ring tracks and the inner ring tracks so as to be capable of rolling a plurality of rolling elements, respectively.
上記ハブの回転に伴う上記位置決め筒部の外周面のうちで、 少なくとも上記制 動用回転体を外嵌する部分の径方向に関する振れが 1 5 以下である事を特徴 とする車輪用軸受ユニット。  A bearing unit for a wheel, characterized in that at least a portion of the outer peripheral surface of the positioning cylinder portion along with the rotation of the hub, in which at least the braking rotary body is fitted, has a radial runout of 15 or less.
PCT/JP2003/000727 2002-01-30 2003-01-27 Bearing unit for vehicle wheel WO2003064185A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2003563835A JPWO2003064185A1 (en) 2002-01-30 2003-01-27 Wheel bearing unit
EP03701881A EP1470936A4 (en) 2002-01-30 2003-01-27 Bearing unit for vehicle wheel
US10/914,976 US20050058380A1 (en) 2002-01-30 2004-07-30 Vehicle bearing wheel unit
US11/213,116 US7464469B2 (en) 2002-01-30 2005-08-26 Vehicle bearing wheel unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002021342 2002-01-30
JP2002-21342 2002-01-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US10/914,976 Continuation US20050058380A1 (en) 2002-01-30 2004-07-30 Vehicle bearing wheel unit

Publications (1)

Publication Number Publication Date
WO2003064185A1 true WO2003064185A1 (en) 2003-08-07

Family

ID=27654388

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/000727 WO2003064185A1 (en) 2002-01-30 2003-01-27 Bearing unit for vehicle wheel

Country Status (4)

Country Link
US (2) US20050058380A1 (en)
EP (1) EP1470936A4 (en)
JP (1) JPWO2003064185A1 (en)
WO (1) WO2003064185A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006298225A (en) * 2005-04-22 2006-11-02 Ntn Corp Bearing device for driving wheel
EP1800898A1 (en) * 2004-09-29 2007-06-27 JTEKT Corporation Hub unit for vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2003064185A1 (en) 2002-01-30 2005-05-26 日本精工株式会社 Wheel bearing unit
JP4943019B2 (en) * 2006-02-24 2012-05-30 Ｎｔｎ株式会社 Manufacturing method of wheel bearing device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194103A (en) * 1981-05-18 1982-11-29 Riv Officine Di Villar Perosa Supporting mechanism for wheel
JPS5876303A (en) * 1981-10-10 1983-05-09 エスカ−エフ・ク−ゲルラ−ゲルフアブリケン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Bearing device for wheel of automobile
JPS6282201U (en) * 1985-11-14 1987-05-26
JPH09503275A (en) * 1993-06-01 1997-03-31 アーベー ボルボ Device for centering the rotating unit
JP2000234624A (en) * 1999-02-17 2000-08-29 Nsk Ltd Bearing unit for wheel and manufacture thereof
JP2001233011A (en) * 2000-02-24 2001-08-28 Ntn Corp Wheel bearing device
JP2002019405A (en) * 2000-07-04 2002-01-23 Ntn Corp Wheel bearing device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2512827A1 (en) * 1975-03-22 1976-09-30 Skf Kugellagerfabriken Gmbh WHEEL BEARING UNIT FOR MOTOR VEHICLES
JPS6282201A (en) 1985-10-04 1987-04-15 Mazda Motor Corp Lubricating device for rotary piston engine
US6364426B1 (en) * 1998-08-05 2002-04-02 Kelsey-Hayes Company Vehicle wheel hub and bearing unit assembly and method for producing same
KR20000035349A (en) * 1998-11-11 2000-06-26 이토오 도요아키 Automotive wheel bearing assembly and method for manufacturing the same
JP2000227132A (en) * 1998-12-02 2000-08-15 Ntn Corp Wheel bearing device with brake rotor
US6212981B1 (en) * 1999-05-28 2001-04-10 Simpson Industries, Inc. Knuckle hub fixture assembly and method of using
US6415508B1 (en) * 1999-06-09 2002-07-09 The Timken Company Hub assembly having minimum runout and process for producing the same
US6666303B2 (en) * 2000-07-04 2003-12-23 Ntn Corporation Wheel bearing assembly
JPWO2003064185A1 (en) 2002-01-30 2005-05-26 日本精工株式会社 Wheel bearing unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194103A (en) * 1981-05-18 1982-11-29 Riv Officine Di Villar Perosa Supporting mechanism for wheel
JPS5876303A (en) * 1981-10-10 1983-05-09 エスカ−エフ・ク−ゲルラ−ゲルフアブリケン・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Bearing device for wheel of automobile
JPS6282201U (en) * 1985-11-14 1987-05-26
JPH09503275A (en) * 1993-06-01 1997-03-31 アーベー ボルボ Device for centering the rotating unit
JP2000234624A (en) * 1999-02-17 2000-08-29 Nsk Ltd Bearing unit for wheel and manufacture thereof
JP2001233011A (en) * 2000-02-24 2001-08-28 Ntn Corp Wheel bearing device
JP2002019405A (en) * 2000-07-04 2002-01-23 Ntn Corp Wheel bearing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1800898A1 (en) * 2004-09-29 2007-06-27 JTEKT Corporation Hub unit for vehicle
EP1800898A4 (en) * 2004-09-29 2008-02-20 Jtekt Corp Hub unit for vehicle
JP2006298225A (en) * 2005-04-22 2006-11-02 Ntn Corp Bearing device for driving wheel
JP4526998B2 (en) * 2005-04-22 2010-08-18 Ｎｔｎ株式会社 Drive wheel bearing device

Also Published As

Publication number Publication date
EP1470936A4 (en) 2005-03-02
EP1470936A1 (en) 2004-10-27
US7464469B2 (en) 2008-12-16
JPWO2003064185A1 (en) 2005-05-26
US20050278953A1 (en) 2005-12-22
US20050058380A1 (en) 2005-03-17

Similar Documents

Publication Publication Date Title
JP2006305715A (en) Bearing unit for wheel supporting and its manufacturing method
JP2000234624A (en) Bearing unit for wheel and manufacture thereof
JP2006194293A (en) Method for manufacturing bearing unit for wheel
JP4983154B2 (en) Manufacturing method of wheel bearing rolling bearing unit
US20080310785A1 (en) Wheel Bearing Unit
US7464469B2 (en) Vehicle bearing wheel unit
JP2002347402A (en) Bearing unit for wheel and manufacturing method therefor
JP2004345438A (en) Wheel supporting hub unit
US20050283979A1 (en) Bearing unit for wheel
JP2003002003A (en) Bearing unit for wheel
JP2004106618A (en) Rolling bearing unit for supporting wheel
JP3900108B2 (en) Manufacturing method of wheel bearing unit
JP2002370104A (en) Bearing unit for wheel and method of manufacturing the same
JP2018197598A (en) Hub unit for drive wheel
JP2003214443A (en) Bearing unit for wheel and method of manufacture
WO2004038245A1 (en) Bearing unit for wheel
JP2003240029A (en) Bearing unit for wheel and its manufacturing method
JP4356381B2 (en) Manufacturing method of wheel bearing unit
JP2004225752A (en) Manufacturing method for bearing unit for wheel
JP2018034735A (en) Wheel support rolling bearing unit
JP2003054203A (en) Bearing unit for wheel
JP2002362101A (en) Rotation body support device and bearing unit for wheel
JP2003139174A (en) Rolling bearing unit with rotary member for brake
JP5023931B2 (en) Method for manufacturing wheel-supporting bearing unit
JP2002316505A (en) Bearing unit for wheel

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SC SD SE SG SK SL TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2003563835

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 2003701881

Country of ref document: EP

Ref document number: 10914976

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 2003701881

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 2003701881

Country of ref document: EP